{
  "manageEntity": {
    "action": "Save",
    "entityId": "656166367",
    "entityType": "Track",
    "nonce": "0xe27d59a23447cd0b818aca26e578ea332ff9e9ecfce453e0cbf1fd564d30389f",
    "signature": "0xf5b469ecd6065b73fe2473355b89c3b9dfc7df7341653394dfac909aad30fe4020a36c0559418c2c9be4b23d5c71e3f67926f780c69020499f3df88b9c7831441c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}