{
  "manageEntity": {
    "action": "Save",
    "entityId": "705506478",
    "entityType": "Track",
    "nonce": "0xc697a6942cd0346c9416c9eb3d9370af2f00f305ca4927dbef6e55673d650d3e",
    "signature": "0xfda542f29d680496b00e3134975190c0053d2a49a5f8a033f02e818e6e9785f52bf16a8474323e675f419a52a23a07e4bdc78b69ed0d395ea0e471e0b5b4583e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}