{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "297394",
    "entityType": "User",
    "nonce": "0x7f7a4987f9bb7bfc2bcc08d29cc55427a0b97b05dbf9c5b2df819b414d3d4fa6",
    "signature": "0xb8663b57ef9fd611b58ee560a706dd99e2ec5f1c135a0bcbf2441fc2b8d2b9c4586c3071b32cc78fb4399eae6beaf6f2790850b3912d7fce7fd23c55bd3043a21b",
    "signer": "0xa4A3F3480fA190Be98764c41851DD9969f3A80a2",
    "userId": "23420474"
  }
}