{
  "manageEntity": {
    "action": "Save",
    "entityId": "788782879",
    "entityType": "Track",
    "nonce": "0xbfc10775b00e9204eb77ca7c12466b24705cadb68741728627b90098ccc1968b",
    "signature": "0x5d872de2384afe5d52ef3ed4806cfa505674dbcf1f8524d9b000b9308521dc3069cdffc52edfee592d5a8ff38d7d1a3c8c6d5213b8401b41160a6ecd949c84a01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}