{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654850510",
    "entityType": "Track",
    "nonce": "0x41407789644a39348d3a9e51856decb038a748fb004b8eed6d44029ff2aebd30",
    "signature": "0xe149ea3a4e52bf6c5e9b9b97134e685040a842ba5ecda7b7ed6c5a3dded7a8854ef51839fda24393ccc48f39628b4ae003aa71b4b3865cdd529cc7780491dce81c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}