{
  "manageEntity": {
    "action": "Save",
    "entityId": "560437723",
    "entityType": "Track",
    "nonce": "0x5d4be6abf0f23e44a6a67c58deb605510e58695997a37f890e9a84888c6d4a23",
    "signature": "0x97a21f4543b28baa0bd52084f92c7bff633d4b358691209c77e090ae800459043b4cdd78ecdf6ff4641761446521c02a7900c0d8a0570e9d5412f1a1fca72b6d1b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}