{
  "manageEntity": {
    "action": "Save",
    "entityId": "524090247",
    "entityType": "Track",
    "nonce": "0x5b6d7decf76443a7a6ffaaab15935a28d4539b0a2b2d66a1351a4c9c65341e5a",
    "signature": "0xe20b0d0a3e34b37970044896abb3947aeae754f153c7dc6c7ae46f0ee95d844b110b2f721babc95dab3291a262bd362623c618c1aa7a9a923370653e10a1f58e1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}