{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876287592",
    "entityType": "Track",
    "nonce": "0x4ecb0a322f543046c56d3e8c6f8311783fe0a8765cf9ff3e7976e5d1da3b26b9",
    "signature": "0x63c29d5107fd0801dcd0fab7f532795feb58ed857d88efc1d9df4474fec268fc512a844675424b288107b8ae049ab615d34e3d5bdd3800c20f779417d84050fb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}