{
  "manageEntity": {
    "action": "Save",
    "entityId": "1288367325",
    "entityType": "Track",
    "nonce": "0x37f46c8e3859acc1d84c27b9fdea32fd08bb8227763b918c4b41387e3c60fd43",
    "signature": "0x687da3452aeaf073e34f0c71169785f39a028569b24df9fd784b996df4abab0f753653f1fd79771d1265a6e416a5406aecf0bcf91a710e77570c272da3528e7c1c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}