{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385460276",
    "entityType": "Track",
    "nonce": "0x9376eeb6b94af3773e28d4e337eb6d6ea34e6dee0d352f3ad96861959d01c78c",
    "signature": "0xb4a5dcbe0223282060ed5ba710daa67dc70b0e1feafedd092a43c5eb5f3a78f778d2aa55cca20a99fbe1e97d964a613acf7af5366f04e3ac2c0bfd4563afa8701b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}