{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848453217",
    "entityType": "Track",
    "nonce": "0xfad6b369e56c17c66e14ce283da6df42f378d96116b895f957e72fadfaf8409a",
    "signature": "0x46225005609d42670c479957bd5e886a0f17efc6fa544e441a1e24dbbf1a2ef15707745bc76edfc62883ab6930d7b3fbfdc9b3d6c492ff6b6651beaa44364f441c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}