{
  "manageEntity": {
    "action": "Save",
    "entityId": "718892582",
    "entityType": "Track",
    "nonce": "0x01458931526da8d7cb919e23ab868d1b8f0acdd3770757cb3bbd54e406208df3",
    "signature": "0x4bc8098e1ce28b2733eb4b544c8a1d2ead3ffc89f7461351322c2395c205be974bf1a15d8980314a03ec86e702a2f0c90705b58a2146619a0dbc97f042baec3f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}