{
  "manageEntity": {
    "action": "Save",
    "entityId": "1778772341",
    "entityType": "Track",
    "nonce": "0xa23d098660c3ef493e5484961694ee49d517919913d52f029b6b95fa39c6fc4b",
    "signature": "0xb45b35eff05f1b9ff257be9de03167ebad7855cb6accc41c0f1bce6c20b16653402b84d2f2dcbf794638430373384258867c4c5a3ac461ec7b702544f2fd027e1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}