{
  "manageEntity": {
    "action": "Save",
    "entityId": "210149",
    "entityType": "Track",
    "nonce": "0x3c9014eb12c50a073339ba5ffd391e917569702f74b3760a724206701709a2f3",
    "signature": "0x82871550199a542ee9180ea05168caf790e5a72338e43c67d8613f88026d31b00a5be95bb3ca7e07df8eff018b5a91afceb61afe0af0db5c98b2f5f8ea7056fa1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}