{
  "manageEntity": {
    "action": "Save",
    "entityId": "1640086484",
    "entityType": "Track",
    "nonce": "0xf8782e8b838ac1baa64b06284b3259f9eecd3609fba52de2df02cd67d422b3da",
    "signature": "0x93902c882b4df2090af03371a633c9653c098e131a093f518e97faa2f37422a3192ca180dcd9f3991d9a483bcf74db31ec57993801e7b5beefe1013b369373f31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}