{
  "manageEntity": {
    "action": "Save",
    "entityId": "1241244154",
    "entityType": "Track",
    "nonce": "0x08e12915ed50ea7e48142884281a858bb4460e9188f94ad70d07e68b15c156a2",
    "signature": "0xa501b79264d01e3916c69d9fa223816ff5da27bf4a11476ee58d57d93aa0a8e902c257c82f73c8168fa7c2061fdc1167b42cf06f61d8c4c1f23a9f4f258acb091c",
    "signer": "0x3e4953461b6671604B2E8fcD0BdB628DF4C16609",
    "userId": "167051786"
  }
}