{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780442903",
    "entityType": "Track",
    "nonce": "0x93af16a6fa2891f413dff6c1fdf9409a018c2d0257fcd79ef12a66ed7ad6456d",
    "signature": "0x301d402f021d27dafac96dee8e23ff1b80b87fd7db3586190fa41e7ba27f58ac1b595b9d8da1d18c18f7eca355dd75e8c74b917d7496c0a7fee6e7417513dca81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}