{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341789127",
    "entityType": "Track",
    "nonce": "0x9ab2606126279a6aa21fee6a3f8396ec67d74a9ec63fa0e17a329cb7fd42a704",
    "signature": "0x67c31b5519dff0cdb538960e8cb5cfe393e089a1d5496377bc33c89a606b1404742bcf778700d66d9dc38749068d2683c4f7c67602b76f32d427ad3ba4b22e3e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}