{
  "manageEntity": {
    "action": "Save",
    "entityId": "993020",
    "entityType": "Track",
    "nonce": "0x2477cc350cef194778528887f89eed5727314335da34651c00394a8eacc6328b",
    "signature": "0x78a15498822d4253ad3c9d26fc2ec68ac0f2db24dc08aa4d377f532755e3f50432da4fc08ee559a17e428a5c63fdc364a5da0915de5dd237f7dc9d20ddcd75c61c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}