{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289524997",
    "entityType": "Track",
    "nonce": "0xf70df424f126ce739344c4c732a72f3caa569e830de9af171a775871437e2ca6",
    "signature": "0xb1b1df264cd31a957a526721062419f8cb56f3f0abdeb764e149bf1b3e86c9535b36c5d5b059e4070ca2151cdb00eb58a8d92919f90ec4bf5edd98c8e4fa87f21b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}