{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340591",
    "entityType": "User",
    "nonce": "0x84cb2fd7ce9260c018b79aaf85ab09391bf4bdc4bf8fabae82636e99380c1edb",
    "signature": "0x0a1504b283d5480d4660d8092969d5e027ecbf5ac1ab2d5d3fc3db391d9f448f3d64730b1217cd37b1ae6d36f18cff703212c247d7ca4c1b617d1117d61f46f21b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}