{
  "manageEntity": {
    "action": "Save",
    "entityId": "325246065",
    "entityType": "Track",
    "nonce": "0x3124510ff725494e16e31d2781dbe0e15e710fb9acad3e8804f7f91e61f20a22",
    "signature": "0x8093ad35f01a0e953e3bb5f46046cd7763ab686999fa9b7118edd1115e6a155554a904c898fc2b870ba08bf9a5a30cb0e9ba7e47eadb110fe84cc20e2c58faf81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}