{
  "manageEntity": {
    "action": "Save",
    "entityId": "1553660270",
    "entityType": "Track",
    "nonce": "0x8a89ec3e198bdfe98f2ba697a5b9c5dd4ede9bc15f2a5af7c348f1eae8430f4e",
    "signature": "0x857bc23788cb98faeb0486fbc027b7e374071f533cf0298a5eb02e06ac82594a036e2d768a7a950351226cba45d59dd493eb998e165d19fa881b0d2ef9cfc89c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}