{
  "manageEntity": {
    "action": "Save",
    "entityId": "655124",
    "entityType": "Track",
    "nonce": "0x5b8aa8d6b14f7a5bef99a2b5552f8e555c52ac8987d7b1e5ec6842731c670acd",
    "signature": "0xe05e4e90bcc0cfb8c356077c6d670c274ec896fc63aa79de584d8b10f9eb400b74f7e5eaa3f818823444df223f30ce71cb67e35ed8e379b5f11192d4edfe49ad1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}