{
  "manageEntity": {
    "action": "Save",
    "entityId": "414962199",
    "entityType": "Track",
    "nonce": "0x3b069674dbed88f2881d09b0e82d441bbe1a412add870f7e1b10b4a5b56a0b75",
    "signature": "0x88cda1aefd03f066a2267dc94be82a7de4569c5ce5abe05d70b0877c5e5f72117c59c365b31bad86df449f8a81c3478a5acfce024d4ceaef8603d25f1c170c551b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}