{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "139146722",
    "entityType": "User",
    "nonce": "0x881a4ec0ba28ec30dd8a6d8879e1b82b3636673d08522b9b61a761980de5a503",
    "signature": "0x2be09d50c7b6cf21e45402128aa7203d7837afdde358e88d0c35cbcf6b575f283f9f510d582bfa64e0e23c7b231152ac84841c56fe6b3410fb8e1b5f857b72c51b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}