{
  "manageEntity": {
    "action": "Save",
    "entityId": "51358",
    "entityType": "Track",
    "nonce": "0xfac81033a6de13d57f00fcff86a56935d985fd73336ac69659f56d78eccce915",
    "signature": "0x0b7891399379d017133285f096a8e9b9f9b80e9e7fc5e8bd5b3f095c3899850d7ef90c716abf1143ade7cda7e5c6f78c14529f0ede3e8564df882609c4b5f2a01b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}