{
  "manageEntity": {
    "action": "Save",
    "entityId": "1744228936",
    "entityType": "Track",
    "nonce": "0x60f1dc0918e31dca4b0a1c8beecf16d486827ebe1acc3dc9dab1f60f5aaedf1c",
    "signature": "0x739dcb9245293360c2916b9de628b82068ab086b45a82ca10feefc8305635b3a26eddc17b2f538489c57d9f48ea2886f3e62e31a6a60d6eff0bf425f912abe6f1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}