{
  "manageEntity": {
    "action": "Save",
    "entityId": "177296129",
    "entityType": "Track",
    "nonce": "0x58e87f139a3d63433e9051175f6152bebe240cc68e3e8e0af011de5f6f1fed3c",
    "signature": "0x6aeaf0dfaefde9f6191d1630c997b18a6feeb228a1c07a8987fbc7531f80ee864671195d4182acc8d3ef97a7ad48a1e06ac943fd4de714fe1b4e05761a15e5071c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}