{
  "manageEntity": {
    "action": "Save",
    "entityId": "193655",
    "entityType": "Track",
    "nonce": "0xf614fb3f1f5f81cf1853072bc5524514412137e44cf23f910ba30efc0ffaee63",
    "signature": "0x868783babe6053b0c4382d61aa907edf16ecfc0abeb19a90ac0896897d2939b72316b3951565c9686957302c9afd211216c1e9ecc446c7d2d1fdd90522ec7bc21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}