{
  "manageEntity": {
    "action": "Save",
    "entityId": "38411863",
    "entityType": "Track",
    "nonce": "0x6b8653f02cd56742b7a7d052abbeab91fd93835bb6f299e62c6d365cf8d060d0",
    "signature": "0x22ab80cf4cd2a1a60a7249acd5bbcfde9e4b823a7f1b6b77ea1d520d20a243ff47e23b3de872c9c0c28edcb7fbac31e402d060653008089dcd539570e705f9811c",
    "signer": "0xb0bc7585AC84F169814851A3C22d8d92D133337F",
    "userId": "267657235"
  }
}