{
  "manageEntity": {
    "action": "Save",
    "entityId": "636845755",
    "entityType": "Track",
    "nonce": "0x49fb742b85db3f43840398d4147d03a230ee40acb38d81a20f7b7662c9aafa53",
    "signature": "0xadb11d93333471456b5473f0ac782d7fc89a68e3075bed822b97ce1d02ee736351a697219700f8d3a5e61c5b536523dd55a46fffc157e4b1d62a9c809bd617f61c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}