{
  "manageEntity": {
    "action": "Save",
    "entityId": "1771025257",
    "entityType": "Track",
    "nonce": "0x83410e7971aac9e5eafc5c16f31661d908f7b1f138f5c6ff2b0887089d328a8c",
    "signature": "0x42986308f2380cfd0f0fc98f923472ba8f9112192422e17ada07fc03b59df2a51735046d22fd28725f1d2af409a8f59c29a96c1247838cf0d1b131d1e209fbf91c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}