{
  "manageEntity": {
    "action": "Save",
    "entityId": "829373114",
    "entityType": "Track",
    "nonce": "0x2dac9ad6287ae703250d8e9c3d5916f4c083e63190cf5994ffab1199b364ffde",
    "signature": "0xbc0b33ef17992ba118acbcf8be9e5c04abfa036e05bb387c16b5a021a4823b7962cc6e41dab79e622f13697be9a64bb674be3da2ad8bc89996f370bc127e9bab1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}