{
  "manageEntity": {
    "action": "Save",
    "entityId": "469027451",
    "entityType": "Track",
    "nonce": "0xe1d3fd3dbb75426106f054c07d21b32933af06c7406123cdafea48c10028618e",
    "signature": "0x1377259d0036d1524093d1a7efda3f8c9656162ef0773622cbcb1e190d6f2832149d2928e54655eec8e77ceee177574494b10716210a167023d00ddd10a974a91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}