{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617530481",
    "entityType": "Track",
    "nonce": "0xf5b1ab1e4af7f92e0d0ad7ef6012bf2a109c6c0a064847b70ce1c43e591839f8",
    "signature": "0x1f452ce86716c7078616f0dd47435eaa0f420e4325dcbe80b45532f5ba24f51a1e4bcc74d19106d5089bcf04ceead4d57222b3305d93007a5cef2f5363e0afb71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}