{
  "manageEntity": {
    "action": "Save",
    "entityId": "2051060554",
    "entityType": "Track",
    "nonce": "0xb5d6b7aa5be4770aa0458cd8d4c5d522a26a664b2d2785e0225fe727e1d7c271",
    "signature": "0xc00406278f67649472d6d6c4043e81917e7932c5f2b37f82451891d4b73d780a1d427226cfa9464a81a74ab6b48753bc0f160187f84339345d3196266624d1741c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}