{
  "manageEntity": {
    "action": "Save",
    "entityId": "951979586",
    "entityType": "Track",
    "nonce": "0xb118ea6f8e8c86be15793e7a4b7ad60eb9cc3dd39dae716f8d2150e877c4492c",
    "signature": "0xb36beb40ca87d4f5d52ef9b335dc40ea98a2f9905a1df690968c204b6a5ed2953e2671141879476745d906757baa9bf68aa8ac62fce275ee594169874ac3b7c41c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}