{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893026560",
    "entityType": "Track",
    "nonce": "0x6ed87a1a188dcb45a844b3182896d9a939ef06be34512fdf9f4c0cb260259ad5",
    "signature": "0x3050d9a1e772e701b69b51bfe0fc418dca8e846c0501032896548e053949f77226854b23251c4b4c70fdea5980f2a3eec42e85e88c06e9e3bce5970d00a216eb1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}