{
  "manageEntity": {
    "action": "Save",
    "entityId": "351027230",
    "entityType": "Track",
    "nonce": "0x0abcd3dce140e4087e6d2bb134dca1b33b282b0e8687406d04b99347125c3cd4",
    "signature": "0x88c162af344268333adc7ffc40c2301f8f34905a0d667678d43b254c7b764e873fbe5025b2b1dbc6a038824e2a2c1c99b4ba0c0af6402038ff8ad33526a266701b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}