{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525386735",
    "entityType": "Track",
    "nonce": "0xea6412076b1b1a73b53fc484f2c6b2cf36df0039ccec7c510cb376e3f2c4fabe",
    "signature": "0x218423dc6a537dfaa7d7b0f94bc482938d356370cacb8335445267ed9c61894f153ca54cfd476863ddf72bd4229c1811c37e1478990404003ca505a07c4061ed1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}