{
  "manageEntity": {
    "action": "Save",
    "entityId": "178680819",
    "entityType": "Track",
    "nonce": "0xf9cc0447fa3fb199a6be8e8c2e596204b256c1284ad15f0d6e9917e19ae0385e",
    "signature": "0xf737ada1087ffd8277d36dcf88e57b98c88fb29a3eb863bcd1768e0959ee19f0181dac9c876e509a6c1daef7ea65aae16056743e6358dad80f58c99600271c801b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}