{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077746",
    "entityType": "Track",
    "nonce": "0x1d8b4a4d5e5444fadaa86074570a08f030ec8c19258ce57d7cedb517b1405db9",
    "signature": "0x474b414e3576020d1056e90d25f4824678ae6052f4b1337f5c0c3b007ac8bef02008d5512462015e49994341d98aa35976a31b024a7bea91818cdf7343a1616a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}