{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x208a06dafa57611af372d5839e7a4a9e18b7aa825815a50c020399b0fb04b065",
    "signature": "0xbb13df760ef1d1fa2c446c87150317702deb4e81a394f76fa6827972c12fc76d6af57b3e628f7c9c4c6cdd72c8eaac964544c7af4075f5ed882c2b0b3a69dc271c",
    "signer": "0x64F598C81c0625EA190d421bEe9C604A9EaD5ea6",
    "userId": "462839245"
  }
}