{
  "manageEntity": {
    "action": "Save",
    "entityId": "709783",
    "entityType": "Track",
    "nonce": "0x07735cf4d4df0b4c1e8c8092316baefcdbf670b27b556e6d755b02c4c43aee05",
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    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}