{
  "manageEntity": {
    "action": "Save",
    "entityId": "1152673812",
    "entityType": "Track",
    "nonce": "0x7f45701975f44e7cda2148bc9fd4ff6fd39aae0aebdae642ac03eac2457260e3",
    "signature": "0x2dc8f172d46eea5194b403eeca908ffb64b3d96711b76a9140b79e453d8e38201ba41e0869619f10e360b8154f93d74608f0780874679fb33a04baab3d4636931b",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}