{
  "manageEntity": {
    "action": "Save",
    "entityId": "794421217",
    "entityType": "Track",
    "nonce": "0xc708a73bd2f68f358bda7914e365b381a70774dbf2b5c73cb4b1f3c9a7afe19d",
    "signature": "0xe3ba6da89d0e6cd21374d346a73b88660c57631ba7140689d543fa9eb69cd61f299539fd33f57fadfa2bf05873e751b150b5d151a3e03277abd4fb395a4281611c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}