{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930587395",
    "entityType": "Track",
    "nonce": "0x91d49e392a157c31ce09163f232d12d66f64921e910c1436faa5a5345332836f",
    "signature": "0xbe1b8f0855f7855c79336385049a83bbec5395d9fcae2f875cf6b4b6ff7525e1715c004f1c6512202f49bc9eca4402749e3fa0774485c868f4330aa8160841f51c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}