{
  "manageEntity": {
    "action": "Save",
    "entityId": "592095288",
    "entityType": "Track",
    "nonce": "0x7cfc540a66261441b681d88217dbc88aa65593444282e67fc3d0e884db80c71a",
    "signature": "0xc654277d415bddafe15ec6e2b8edabb375b83dd76b97649478529398076157205823a4756743680795e3cd8678b842f2e5102b89e6a1d08377f2521175f5ffa51c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}