{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106394790",
    "entityType": "Track",
    "nonce": "0x451f13ff24f679eb2cd7df211c22870964573f9ef423072d7fd89e5f0cbf79c5",
    "signature": "0xfd183f7351a3bc7e330702733ad346b5b0325df61aaa735606d0e0baa9ddb86332a03064a4b0965b877c7d7ae055598e9cb518ffe3cb32c0d0766047a8acf6e51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}