{
  "manageEntity": {
    "action": "Save",
    "entityId": "1993751204",
    "entityType": "Track",
    "nonce": "0x5200f2e831b5970ac201747482e2f13dd8ef83abefcf147cbd3bd50685c8c0e6",
    "signature": "0x4aa46a68692d0b5bf7ea5b1d2b3524f16ccb26b58322d3a89f62463de7e9db33200fd2910b9e3c9a03306e062df6c1a3234301f2e11e1ee3a94e06337a21339b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}