{
  "manageEntity": {
    "action": "Save",
    "entityId": "250607",
    "entityType": "Track",
    "nonce": "0xb8bf535eb0a6589f4b4b73692f02b3ab0b4eeeb0b285045240968dff9333df68",
    "signature": "0x511cb8d6f54f1902c892af6b4e250b1fe60b8a16734b446d21100fbbefb95cce5abe553fcfaa65d28822dd4c63e174d2c8f5f305514cacc54d47dc54ee311fde1b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}