{
  "manageEntity": {
    "action": "Save",
    "entityId": "1887673967",
    "entityType": "Track",
    "nonce": "0xc3f546c935b3df2e840a1c9f394b64c5304ed742b2f3b8cf5e5a992ee27a9dd8",
    "signature": "0x9e0c461319e4242a931abf1b791601163f48cdfcf7791ca6121ca909ae6aa8a330848ae727aa5cf7e64ed3e59f2c6f5a746a736e6638d9eef974bc05abadc7551b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}