{
  "manageEntity": {
    "action": "Save",
    "entityId": "858540671",
    "entityType": "Track",
    "nonce": "0xca93dbee8e6f78c8d6936a5b95869aede79d73399fb67e1ad7aba8487ff03fe9",
    "signature": "0xa712fac83d9449d35b57e00fa51daba2e9d148ad30826f259e59126998a303f950f8e2a56c65e396df9bef2fd0862cd5132a49d625da95139d53c627471f880f1c",
    "signer": "0x4810fE66B3A42DA4cb34b622aD9A069C293c6b86",
    "userId": "445042807"
  }
}