{
  "manageEntity": {
    "action": "Create",
    "entityId": "612637816",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"amazing\",\"entity_id\":54045213}}",
    "nonce": "0xce9a2b2ff8a292b8046ea999a538d409bb191631bd4c260f80bec9693a090b6b",
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    "signer": "0xa0Bdd76Bca991051bb01dDf7490939e0d45FFF3c",
    "userId": "99654500"
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}