{
  "manageEntity": {
    "action": "Save",
    "entityId": "1934471426",
    "entityType": "Track",
    "nonce": "0xddc087a10a3037ce5eb5cd586a4fd5b096d81fc6f3ac5856753f662b4571e0f4",
    "signature": "0x13c6f77e579de5272ca3e6c7bc396ca2167a0b3d0648035fa3a4bdd9a5c9d2600474662489174b1c6bf04b773d5b8eefcbf1d67986ff5c6a8aa4ff3691fb22bb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}