{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834114783",
    "entityType": "Track",
    "nonce": "0xd290ee58fb97978bd7339ad708dc9d46b5aa89d9fe27f5660c771f1c744a5704",
    "signature": "0x3b8fa4dd0a04d0d1e53feae4a8263ea8e233deed7f7aec2db7105ee8638208c726bae9d9438727f65e7999946543c095d21621cd84d99b3d8ab7bd0d618929471c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}