{
  "manageEntity": {
    "action": "Save",
    "entityId": "219201887",
    "entityType": "Track",
    "nonce": "0x2243e6a9a8cb887a035198657662058bd0f61813c949906d9db67975a8c138ef",
    "signature": "0xa9a44a1f2829866218805ccd03d4b0efb16729de36f544c39229767762a4821e4baeb4628d83681c0462718f28381c4f0030bf2ff007740334b671af34196c861c",
    "signer": "0x0CD9dcF9fcCa28bC63B06fF92A4214f7Ed04b0aa",
    "userId": "733078358"
  }
}