{
  "manageEntity": {
    "action": "Save",
    "entityId": "1208737819",
    "entityType": "Track",
    "nonce": "0xbfc6bbb6f5d26d3bee635e28766ccb335f9572feac7480cdff2c95d8eb57017d",
    "signature": "0x820c54593c978245ac23b7fc721ff37fece1c28835921cd415eea7af66fcae340e97349c8269bb90975b6bc188fbb839e1789e68141f0095c40a19edd2f518681b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}