{
  "manageEntity": {
    "action": "Save",
    "entityId": "532063828",
    "entityType": "Track",
    "nonce": "0x4cbf412a094b6e1bb286e6632239601f60468ba304ff318d62ca9ec961eab7ef",
    "signature": "0x1f006a222fbe3132eff14ffa924d0a6edbe69bdc10807981ac209de13a9851c379afb90dbf83e37f258194c526074da412815f31a627838ea587b58c547019021b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}