{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508116473",
    "entityType": "Track",
    "nonce": "0xd82bcc834efb10f9338d23e2dbad92f9374d3a9a34eb0356c066b6237bb24eeb",
    "signature": "0x6aed6f3aececdb7cfc47a25f5d4a1ba2b8490c3f1f4046dd85e319aa3116f5c139686b83df23720e2d46cb6f5dee272212614457036304853cd2984792d7094e1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}