{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895052938",
    "entityType": "Track",
    "nonce": "0xbcf6d543ed4fc9aadfdaba61c967eef537a10edb9dca8cb451ff1aee96edb002",
    "signature": "0x8703700cd9f8f2952812700dd14e9ff2e4cc9d2e3c8e806542e40767ee0c9bb01cbf9918c0e5fcb1f7f9a1600936dc1fbda74112b752470e75157438680b42911b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}