{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917884581",
    "entityType": "Track",
    "nonce": "0x224da0f36eec0c4cca6e78eab527c2dba07ded15dabe83ac2e78288316d93218",
    "signature": "0xb016d77f6d682a6a2a9d320bac7621694a26cf25c45f87a7b5227d3f2343c7212afa49aa2d95bce87d93b98df2f087e2cae0e3b05bdf447076236f8b6057d0ec1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}