{
  "manageEntity": {
    "action": "Save",
    "entityId": "857655624",
    "entityType": "Track",
    "nonce": "0x1d6c644dd56ffbccb5ed9debda80abc4e5011ca41fe22dd376f427d982aa8b41",
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    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}