{
  "manageEntity": {
    "action": "Save",
    "entityId": "145346337",
    "entityType": "Track",
    "nonce": "0x7f69f66dd8d4ea27f37b4a620dca7fa6a91e418a5a2754a7e370e91cc07681fe",
    "signature": "0x83b6c0d61614ef97c03ecf3e9e72ed41aaca01b04132313b45b6355aba58b7053bf4c42d1b6efdae93dc0aaf2aaa0955dee342949e469d047d62c2e95a113a411b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}