{
  "manageEntity": {
    "action": "Save",
    "entityId": "1022864217",
    "entityType": "Track",
    "nonce": "0xd34eb90ae43d3cfb8a64d199f76e95a6afcd9c9b0ba3ecfd7716f9b1a18668c8",
    "signature": "0x7b8b8ef01f4460639d1ed12c6325302df70802c5d6fe46b49a4089f9982631bb4f97700a7af8ca42e5edc8151cd7320eec39b6d23b0aa110be4ed0eba0fd6a861c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}