{
  "manageEntity": {
    "action": "Save",
    "entityId": "382874",
    "entityType": "Track",
    "nonce": "0xe4892a240ae250d196d179a426e057a6a38d664d2de73ba93a448bdce0a39bc0",
    "signature": "0x5df4fb4902cb464072086bc6ac961d67535f48b5e5403b724131c1b584732d4465a80aa8c1cd3df27a8d1e101d91197cd2ae74018222330a7c570a3e6d3a3d111b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}