{
  "manageEntity": {
    "action": "Save",
    "entityId": "1912424391",
    "entityType": "Track",
    "nonce": "0x2891670c55d8c22fdf4e253b879f9474f77edfea9d44f2a27a265aaa94c27a19",
    "signature": "0x1b406970f96e62c76692185b9a3d968953c565ddef67f0315ae3f0434af28f915a7a50c17a96907dcb6519f94a1778ee0049d8c0605222e64ff500305cf3134b1b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}