{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689131571",
    "entityType": "Track",
    "nonce": "0x4eac33ec002415788d2f29ba8c0623cb249288f8e57df1ceaadcdcdb4518036f",
    "signature": "0x629d9d8c5f4a5e6b08cc2300b5e693ffa88895a9addb59ecb2cd12b50599fecd07efb9e247e1284fc8494f7e3d96200b4bb4569ca7f9a8d8a29fb141bae210991b",
    "signer": "0x2be0f08F6d992D6Ba1d55c9634D8B8fc25f9562a",
    "userId": "384670"
  }
}