{
  "manageEntity": {
    "action": "Save",
    "entityId": "73706156",
    "entityType": "Track",
    "nonce": "0x9915328f78d8fd4303b1c5a3daefa5d487f3110295a49e6630cf4ade52c7701b",
    "signature": "0x3fbbbd3a5499eb0ebe5aeb92f9cc7330314efd1167d72950d697ba05103fe38d4406cc5900eaf9a527e62f7056b139b3cc57fd865f0408fa42736b3f34c141471c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}