{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077241388",
    "entityType": "Track",
    "nonce": "0x40c576cfbb87dd42a072963f4a4a598211f4fd54d44ccae5f04c2d345e9f45ae",
    "signature": "0xd819b80321f33ea0aeee5d318a2849f032166aef3e54e2e76b5f3882c05326111ce09054f1be42c19af72ce41dd51e3c254a02822b2d99e24863d0e1e021aa701b",
    "signer": "0x2e698b689b12D588efD109685f92f24cc33D1d70",
    "userId": "574670841"
  }
}