{
  "manageEntity": {
    "action": "Save",
    "entityId": "158800397",
    "entityType": "Track",
    "nonce": "0xca9c9870683eac08b215eb7312fda2d385aad8dc9a12c2f9c977d63fcb2fc275",
    "signature": "0x8bd2bd18a4ff7f0f16e4e43be6490249705bda7283e8260a5b4c5e12016895e457451f9d75f90d388e9151fa97471f1a6a0b01f5128f0b8aa920199abcc98d441c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}