{
  "manageEntity": {
    "action": "Repost",
    "entityId": "559521",
    "entityType": "Track",
    "metadata": "{\"is_repost_of_repost\":false}",
    "nonce": "0x8649f0abc4efc84b2925c5098a06a2d8a0a094edb639d109a017ed150ac01e48",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
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}