{
  "manageEntity": {
    "action": "Save",
    "entityId": "267616513",
    "entityType": "Track",
    "nonce": "0x487e9a0deaa15cba696ee5daa4dd811432a4f9bdb2b1939bdfea4f062a0f3d5c",
    "signature": "0x834bb96df50bb0514c976faef48b8a24d4b15452ff2223d257c321c9b1c17f385c593a7b3aa28ec9b08cdaf21b7939a13bb8346677e1779b2b5d359b3bf72f231b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}