{
  "manageEntity": {
    "action": "Save",
    "entityId": "482912",
    "entityType": "Track",
    "nonce": "0x3220ac2fda2be0fbfb8b97d84b469816b2d6614bee6a254300d505ab3e0b35fd",
    "signature": "0x2580299dd93b4d4d140eb2274d305171bf8fa6e47e907ff692b78eca79f1b4c263177be994ee2bf58f9dc09dbcdba05e548cf57caa8773c7c61223a9a13ed3801c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}