{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007831729",
    "entityType": "Track",
    "nonce": "0x9463ec9c72fbd3aa522e86214188e53d5d76036e7fed7f5f7451906bf2067ed0",
    "signature": "0xa892a0d868b4522fc6a078fc77cdcb2d03feec934254a1a3dfd43643a88faef72c7c95f2f556ddebe8d2f52037d61526f9ae8ab61dc1901388e364cc99f00e6f1c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}