{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506789556",
    "entityType": "User",
    "nonce": "0xd086ffb1070e8476876cf95b95fb943d9a1ae6e5e68f06914b4476719061437b",
    "signature": "0xbbae84138d29ce3239ab4b0db0f6ee7fc2da38a8eeb72c4d50266179729291316f1c942cca4ee368209fbded2bc5a42048bb57ea63afb20f9ae95494341ccb931b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}