{
  "manageEntity": {
    "action": "Save",
    "entityId": "1183940903",
    "entityType": "Track",
    "nonce": "0xd6c66f5ce3ffa9baa481ff960a12df1f16ed696568870e59253d4860079a55aa",
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    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}