{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284127143",
    "entityType": "Track",
    "nonce": "0xb5433e0ce526058e91680273f914d01d944ffa93395c8710146e2e759ee065fd",
    "signature": "0x620a41ee2022869cc76a1c0d463b06e0cd4df2eb3202a5e102c1b83b5bae400b1563c86a6c5b8aac6e4c226dcf6a3c58b11c180d82f68a94e9ac8d40a4914af31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}