{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585058689",
    "entityType": "Track",
    "nonce": "0x1f558a6afde4ac379496006a9c4540a8adfd342afd91771de691b7c10593e3f4",
    "signature": "0x23b76b48f92edee86209a76070de532960b7f2d0ea88172081b3a3f3fbdbd1431021873c20410c1de5c30ad1a8466791e949d0fb245cd8432d05fd7970d290161c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}