{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401462565",
    "entityType": "Track",
    "nonce": "0x882a1b7d210f0fee9eae6e2a41f9da421fa7e15a637734e4f7ad083087ff8294",
    "signature": "0xc3f5ce8d26af5e3899d167ce5f084f9104154649d13edd109628ae383e4698445101b621d4cb0a885e60fbc15ff7e75e51df585d64bb13f714f1ca1596e7de3c1c",
    "signer": "0x6847b1C1dC4037586AE520454F7D9082f75cDB2c",
    "userId": "857826100"
  }
}