{
  "manageEntity": {
    "action": "Save",
    "entityId": "457575682",
    "entityType": "Track",
    "nonce": "0xd8a85a1989b6524e0b79d705d8f455a7aac70c33d662849bfa5827badf498836",
    "signature": "0x2f6eb8306237c80299ce40e960c1a5b6b228c3d2429f9ca9fef389b8c0b1e8d70297aa1649e5625a3ff85bbeb61addee60f023bb9c40d00c37abee08b5db53441c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}