{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625581179",
    "entityType": "Track",
    "nonce": "0xfacee1b6e1ca561e8a53a1709b0159d8c9381e2a0b941887260b51bfbc83856f",
    "signature": "0xf7a7f50f3eb85b3fdc3ad938eb4a0c53039960ea4db3210053c02efc6103df030742563d5d3ae8b8a5698aa6cd814f1e5381f49cdbc34e48a9d55b98f9e82fcf1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}