{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817789288",
    "entityType": "Track",
    "nonce": "0x027f1dd75ae1c439679a9b8ba12a685dbaf81e3121a728ccedddbd5c4099fe91",
    "signature": "0xd1833a49cd318e1ef16e379f180bddf78ef3d020a733467531304b6a7ac481da1b836d28898a0bfdb19880712ded4a9cc1169d750af60553bb7e0cf4d4f20eda1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}