{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913174097",
    "entityType": "Track",
    "nonce": "0xd8ed7d37200ce560876a0ac8eb8e6723a488e7466c94c00320010caba0b45f33",
    "signature": "0xa2737b3bf9cf659f23bf433f7810aa5d33bc65fc45a848ee2117c37e7c4595e46c731d5804b9bc5aa48d6c10806d0f42a0c4e2497eb64d42289d36cdd84531e51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}