{
  "manageEntity": {
    "action": "Save",
    "entityId": "2002118296",
    "entityType": "Track",
    "nonce": "0x398205332726e80a1c81dad6ddd96aa2b4e26c5f001bf1dd37217681f950c8fa",
    "signature": "0xf1b61f431a5784c1311a811fab9201aa37b7e3324e29dbcc92d1c9a0d2c968a20c2f2d3470dea62051bec34d5b1b7b5c2e8fa0ba691edbc11c6b9279d60540651c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}