{
  "manageEntity": {
    "action": "Save",
    "entityId": "168419983",
    "entityType": "Track",
    "nonce": "0x8ed30388b675e24d66b36ef3d60f6fbcdb7845fa73944ef7715b49d877c7e32d",
    "signature": "0xb28da5454c9b381d908824fb55aa521485ac7156ea3fe2f42ab308f2259542046437179ac3522158481815b409b3c5928c6cf48f70be364435d0bc3583b034861b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}