{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3c8446483aa3e24b100df7d6d2f0cf0d2693dab92371537f48874de6e65f9727",
    "signature": "0x3389211d5a4ca66ac95fc661714c0c253eb2daeef59439a0206b60e253b5e5cb69dd1ac9a9968800c7449eb1075d5fc77b1690e0f4ee0c867a5b9439f1c532301c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}