{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100269574",
    "entityType": "Track",
    "nonce": "0x902abf1b9841d7d0e9d3478862e63a03f1220e6d3d19278f8eff7dd59130f44e",
    "signature": "0xfc92b09c2bbd804ee56f6eea78b6a8c8bf100cf237bbc97fb9143263b505267463c9810a664e3fd70eccaf44b9e9c823e53ddbc90693c02dea7530318d36786d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}