{
  "manageEntity": {
    "action": "Save",
    "entityId": "19297179",
    "entityType": "Track",
    "nonce": "0x3dd6a467e70e29752ae38d57d3da62f391facf9cd2aa5e9e6eca654d347e41c4",
    "signature": "0x2a014f23d7b27ac62c0d7ce3ceee3d81324b40a17f3ceb888a78d8a8eb93b61e4b4ff783684ce9d9b89e8738a55b7233f0978501b4a82203775567e65132a6111b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}