{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "964899801",
    "entityType": "User",
    "nonce": "0x559e4db82dd8eaad70741214deefeeea19b2a56d9fd4d0047f1f082138357bbe",
    "signature": "0x4f452f6cfab50c14cb7d65b9cb821f6012c95ec3db4e0cf5e786595b5b64b5b8134f7b2f194a0fc5f26a8e02b80fd41cb42a1ba91b76bf961fe81432cf6c562b1b",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}