{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323402642",
    "entityType": "Track",
    "nonce": "0x67e87abd34afd5c79fe127fe8306015a2d30cdb138b8a321240eed1472e78473",
    "signature": "0xc810cd0ff9d124f7297f07f3fdcf9bd089e99a2ac51f905fa0b7e09576aad72c1e7ff23ee5d824ea48604eb26eca527c08f0f1a8b01f3be83b474370f6655d4d1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}