{
  "manageEntity": {
    "action": "Save",
    "entityId": "1135249",
    "entityType": "Track",
    "nonce": "0x0c7c500f1908e9444284d66d1a94018b3087923e186b32d6f19b056d0e99a82d",
    "signature": "0xacca6adf3afa4a8943ca0d2005534c51ed1fcc46f2dc6c58f2803924c0f560917235a9ab61480ab537f9dd29b02f307e496868280cccf17019b45ae17fb247f41b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}