{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654234388",
    "entityType": "Track",
    "nonce": "0x010c2c68c514e69d985a93e1bd545dfd0ad65c175f54b36ba764ff839fa2d7d0",
    "signature": "0x1521e0baea215935ded573d0f1174c3a421d6bed7a90874f360d8e1fe960d4585923e34760e0ca47e3575c5922884a84ce949770600676e393aad175c90246c31b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}