{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbb72de6fa9e942b142e6cb35ba4e2dd3ea804a5974a0327436669a3069b896fb",
    "signature": "0xaea9518dc94f66ba2bede281495bd03831e9ba8d4172955a84c3cdc0cf4e9e805acc22fd1b233893dacc690aa2957ef445458ec3e68e4b0ed02b823cb8a8aa2b1c",
    "signer": "0x19215DC2ef03F0F46b37940Eb601e5A2a64CD259",
    "userId": "220576748"
  }
}