{
  "manageEntity": {
    "action": "Save",
    "entityId": "385163954",
    "entityType": "Track",
    "nonce": "0x536bcdd09ff7db3aeeff40ca1dfe5d0df25f29e9ef2dc5442a1c5c48d8386163",
    "signature": "0x0c91d22ee6a186f10e3cfa20349bec4f96a66d44faece8bf8f9d3678383943b14ba51017a8a96da7f8e89d023c54a56fd3747eeddb5f0405c09ed853c15c56c91c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}