{
  "manageEntity": {
    "action": "Save",
    "entityId": "460509",
    "entityType": "Track",
    "nonce": "0x3a1c4fcadf7bd1ca7522ff81cb345bee7597750b5017c4402db6a3f5fde99f64",
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    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}