{
  "manageEntity": {
    "action": "Save",
    "entityId": "140811471",
    "entityType": "Track",
    "nonce": "0x8207b20960e9f2e316f0a0f86d688700a061beb3262616bcf60c991a49c94190",
    "signature": "0x468b144947dfbd727c49c32af23dd18123844af9469c5bddcbdc493d4294a2cb5f693c97c51abe2d3cea26b132a68f16affa42b994dca88cdcb46e1675a3a5871c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}