{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331392511",
    "entityType": "Track",
    "nonce": "0xebd516f3c22f348fec0b32574c4b2ee274eb75f8e2725f6371feb55a146c5937",
    "signature": "0x19e52f3bb3ab2d8abb7fbf06eb0eaf5b28d4cbe3852e5e3158543449dddc0235348f07a132053a08977b02e22cde697e998b7b89b1dc72c05383b661916a63561b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}