{
  "manageEntity": {
    "action": "Save",
    "entityId": "1330935410",
    "entityType": "Track",
    "nonce": "0x1389115336c45406da28b5702087bf5c3ee895dd56301b16399385886557c391",
    "signature": "0xffae4319ef328b0d9d2018df31f68c0d02743d26d028afb7b4dc180e0f882f8413d5f8d737606b561198fe5995d91933ef797ff247298b7604f9d8a7f71869ea1c",
    "signer": "0xcd864e8A0A043bf1B2DA4106C35c1daF234468a5",
    "userId": "784246910"
  }
}