{
  "manageEntity": {
    "action": "Save",
    "entityId": "1731157799",
    "entityType": "Track",
    "nonce": "0x2558d17605246d6a92c12b4f33acccbbedae57c34f6fe3d734cff17f4c36dc55",
    "signature": "0xa552ae1fb0dee631d0df39ab19da151cc873c98e30ff129f5877f880fd77f64f2fd7d87f9055bd33c0ddb9415e0de34526a395e2c6dcf308d08a85887a21a1501c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}