{
  "manageEntity": {
    "action": "Save",
    "entityId": "2144219159",
    "entityType": "Track",
    "nonce": "0x9cd50af80177dfd2e5f930cefc84f06652191cb797af7617341bd51e52cb57ee",
    "signature": "0x8547f5ab6e99228005383026b0d9958d2a5fe0d3f15468525a904c582a05d6582e47a9e21b4c0b7a02efe2b1bab810d52552a8464205d5cd977b50f017dd58751c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}