{
  "manageEntity": {
    "action": "Save",
    "entityId": "774007",
    "entityType": "Track",
    "nonce": "0xbcc4b6aa17c2bf884f3518d5d14a91d56ba033a53e8a478913440700cf07e86d",
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    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}