{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137572",
    "entityType": "User",
    "nonce": "0x55bf97cf67970bd9f23dc3be9923d57cb5aa5b3528bdf2c187f28b938dd3ac26",
    "signature": "0x81a96dc53c22f90a87037f23cb3336d9a0fb1d585ca9e89d803f21b01d2a723256479a6dbd2965b3891b0c84306d35a96fc50adb47608769fb6f5a235a98f9191c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}