{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500215205",
    "entityType": "Track",
    "nonce": "0x4a0714394059231692872d381ff0b35d6e834c9dbc07333876d04985e9244dfa",
    "signature": "0x32b2c777335451482b427f1bc9f12e72ca0b6c4b9935de62575a283db568d1d121b9865c637db79b89fd6ccfcff68313150fb152728c86dfc92ce508011b1b6d1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}