{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114474",
    "entityType": "Track",
    "nonce": "0xb82a5792be6c9aaa75ba238d4429fe69e0dd0383a0c0f9f21821c9ec3c4ad864",
    "signature": "0x60d6436860dfc68a9d1de5466a39c03675f9367eb0e52ee0f4d1f9424d39185b16d5869077b09e92ad5d7b6d1fd84aa0dc63451bf7b13eece45da53188ff1c161b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}