{
  "manageEntity": {
    "action": "Save",
    "entityId": "125546321",
    "entityType": "Track",
    "nonce": "0xdbd65b23b469723b7ba37db69d6d7a095ea5381e0b2654e2f25760385bc6ba8f",
    "signature": "0x309a94bef32168ffa7fb9d0d7bccdeff667372db909dee96fdb51df48fbf39085badf797cdaee975cc23ed634a48e1e1f201e467636b8d7941c8b0aa60bb4bc31c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}