{
  "manageEntity": {
    "action": "Save",
    "entityId": "822589584",
    "entityType": "Track",
    "nonce": "0xe0e6dc4321894da8d6d12f4c36c8f21ff32fbb243b1f3c79869c4d965a63518e",
    "signature": "0xe7b9d93da23986fac710073cf700eae542702bed530d2b5a88216a95ee6ca0b010ba6e49cedb80dc04998b020cec26ce467b6ab770d6a07c7ca39fb68ab29f7d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}