{
  "manageEntity": {
    "action": "Save",
    "entityId": "441416354",
    "entityType": "Track",
    "nonce": "0xca461d90e47bbe4a04eace2d0888e2403a39c94ca6017199de5bab4a369dee3f",
    "signature": "0xe03d71fce065836f12b6016d56eb6ced06b6efc6ff7f516b9b5bcf106b1159c05000c733b1609f20b7e2cb449b8d79574a2305c4ea83ee38594f03b2209f48bd1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}