{
  "manageEntity": {
    "action": "Save",
    "entityId": "510774",
    "entityType": "Track",
    "nonce": "0xa55589bb49c41dfc67f588ff0178bead71a378c5e4b775c03dd0e765bc65efea",
    "signature": "0xe417598f5f1f065cf91f029e388178e6ed0d8be1e6e5b791a569e3080d09dff54c2d44c04ca24931f513bf6ea9a60e0e951886db5aa8b1f699e3e555a54aba831b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}