{
  "manageEntity": {
    "action": "Save",
    "entityId": "281816",
    "entityType": "Track",
    "nonce": "0xb70f3b6c305aa3b2b0dbd7b82ef2127c645978207445414eff794c736d872fc5",
    "signature": "0xbd307c77207478849190d447fbf59591eac777df2de82e1abcc36f25fe57069d72e6270c3e72027d078435958dd61424d57b5a3bc2260ef2f1b77a88f165e25d1c",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}