{
  "manageEntity": {
    "action": "Save",
    "entityId": "573656173",
    "entityType": "Track",
    "nonce": "0x3167b42137f6db70c20fcfdcc58e4b599a908de316e5f83e8430c76568c14796",
    "signature": "0xb063adacd4f32ff32987724b6ac0de57561f8ca511ca3a158f17dd0d59356e84681578f3a693a85345b4b063317561bc2f672d3ab8e1ec9711daa6c62ec98b7c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}