{
  "manageEntity": {
    "action": "Save",
    "entityId": "405233671",
    "entityType": "Track",
    "nonce": "0x309ae21c06308b6ef31f8cc39ec7bb13394031291f1017754ca804450d90fbcf",
    "signature": "0xaa2a07433739eb9d5c513faad279dc382a9fb5fb05f75d2d5978bf96a41a1d7e02346ebaef60503ff2117d03d2211a52c86647a7a4bb7da5b281007d3581f6581c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}