{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309529",
    "entityType": "User",
    "nonce": "0x4b07a70e92c8e5e624c8a2914b590427a5da813151e1dd854ad1d37ec07db162",
    "signature": "0xd621578f726fcc08864bc3edf1d8dc3cbb3aa3ebf8f662cfd08c979344b4a0483f74b10a3ba6c6331585f8b45de8c9dfcff7d828d2ef3e58c8074f5613b81a111b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}