{
  "manageEntity": {
    "action": "Save",
    "entityId": "406205",
    "entityType": "Track",
    "nonce": "0xe5240a25caf686970efd8a2fa6739d5106caf22113ba196381159e6f9ed5ce9b",
    "signature": "0x8a43963668476252728580ffe9346ba744629695936a43292ecece53a1e1d7b66d4e07f1e1bb28e37679747a10cd449a41d3ab5bc59cdef5b9522e17bd1240741c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}