{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047105358",
    "entityType": "Track",
    "nonce": "0xccca39ebe5b299eaf2c820248e09dd40a56aa9507afcf8fbba9ffe092255a3a9",
    "signature": "0xafd5bca8026adfb124665a6314319b03df8fd42c8b5895e0506db1056f0f5626748172f75fd2cd4d0957cb08df2227ea76a2068beac552d33cbf0b51e6b63ee91b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}