{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x1e19b9cf30696edb04bd82485d2e13cbe0a3474081da49c12d8143efffaae802",
    "signature": "0xf8d57154322c2a136d479c685bd90ee11ecabf6d7dee02ae1d9a97e8558ac4ca7f3f144a8b2ac91b5c27b5acee885559bb1ae3803eeae6aa9fa4d30288f3a18f1b",
    "signer": "0xfC070d9d02c152146e3D1B2cD4B03FD7a3CA1AB0",
    "userId": "539537193"
  }
}