{
  "manageEntity": {
    "action": "Save",
    "entityId": "248768869",
    "entityType": "Track",
    "nonce": "0xae34eb402b40e051ff38a5892298ccd324ed7efb022dc91b53a6fd5bcd0da8a9",
    "signature": "0x9bd6f7acbbfe7b39e5c5505c33f17db5cd861f7ce5c3b1da25ae5bb5caab113c390dfe3456c3a19db581e33e25dff918a9f32bc1ba9023a84d39a3cd728e39e41c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}