{
  "manageEntity": {
    "action": "Save",
    "entityId": "87222376",
    "entityType": "Track",
    "nonce": "0x12de04c72458a1257d7d845f0998751d35b40c08f18409518b5814128b53c269",
    "signature": "0xe2bf6bfe91a2367822a8e84a13615d08d1372805761bd6bf9a3ef17203c533133af41fd13ad195443c67e7090e27872f62d45bcd02f46b43be4548196e7c07de1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}