{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x149fd507de968ce47c6ccbefe4f7777a95608b3f48f8c42b787ad6eac2610ecb",
    "signature": "0x6237447109d80f1046c2f7892f9aac2ed3e0cd2087fb5a34c3d5abf2d0b3c9847d8c7db68dc89d66614709a5d9fe4096f5144c2e0673228a104711aa404255e71c",
    "signer": "0xDECc0A356D9aa0931867C3FBe28D5c595B76cBE9",
    "userId": "305864089"
  }
}