{
  "manageEntity": {
    "action": "Save",
    "entityId": "1737384671",
    "entityType": "Track",
    "nonce": "0x6bc29c7f79ae27f99819031d8081d4ccfee9b6e262e211cdb464bd635308559d",
    "signature": "0x44e79b3a88bfa3a13384728f1a090a0c3aec8dbc40f53f419b17b916532f4d8a18cc5c3c9a7938a50592092e8d9c8f0742faec0596ad0baae959044c97d917ad1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}