{
  "manageEntity": {
    "action": "Save",
    "entityId": "801139",
    "entityType": "Track",
    "nonce": "0xd0cf677c0a502776b77f415ad8e2f8f93e177106b1c0966a1686a69a07c00432",
    "signature": "0x362861a2c52b9308d90be92fa8192d3d6762c87eb8b2ceac2b22e0f411c574d72e10f0205dbaf5dd7d6bf427fbac2f839bcc258aea289a5e765405b07a2470b01b",
    "signer": "0xfeBBAF2B7d9F5bE3DAA34bEe70259f61ac4aB836",
    "userId": "139146722"
  }
}