{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141928230",
    "entityType": "Track",
    "nonce": "0x1c51a8a99034a1abcf550ab4df6d5da89512187d699b84ca5d2f77b3d3cf7f84",
    "signature": "0x895766f2c952393a29b592dfea1db88a9e6797afedee5e1b29f5c1b9bbf493b3581ed949bbfe205927e22d07c975c6927fb8765ab9f60e2e18c824c9839335a01c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}