{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259038891",
    "entityType": "Track",
    "nonce": "0x211579d4bccf83ff911f0a22c965f871538fd4726e8a58b93dfec5773ff35edc",
    "signature": "0x7374913ee30a45ef3052b45389829b90db18b743295fbe81dbbc29151792e1d9234507b8447eb0115c77f6501cb83ffc280d6a53ce67ffd4d83d0a7604dbbe201c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}