{
  "manageEntity": {
    "action": "Save",
    "entityId": "352232862",
    "entityType": "Track",
    "nonce": "0x2b8b3429a64f940ae20d610d3eeeb1f800ff3d609a6050980d6c41b340464a01",
    "signature": "0x35402c031e5cef0d2561701bd89c4a5e3b61acad3981930c82d67fb93a7a5a351c3e05478329db05b1572215f04566e57424e760b10899c5e887ef40b0c212ed1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}