{
  "manageEntity": {
    "action": "Save",
    "entityId": "962848182",
    "entityType": "Track",
    "nonce": "0xf91408947ce919ba32d4422291bea173d93b6ef182b6830fcedc8edb37dfc2ce",
    "signature": "0xe461842f6193f4911d573f9a11d43aa0ace3c923f381c472b3c79e7829cac7e26caf236230a5f4de8b11d21c9a8de5023657ff5aa64df7d5a89f20ee63a71d271c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}