{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146692039",
    "entityType": "Track",
    "nonce": "0x611be39c93507b3f3bae84744f40a4dff75ef933b73af6d3da202e5c7228e7d7",
    "signature": "0xf7b1fc7c53ce8f7936cd63fe5c53eca4ac44533b8ec5fbea633d408cc3f2bb7b4ee51bb664e6879558678ec16dca464df17e8f0ff5ca2b7cbbe3fe015c0e3ccf1c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}