{
  "manageEntity": {
    "action": "Save",
    "entityId": "108175473",
    "entityType": "Track",
    "nonce": "0x2b34e5d00096fc3ad4fe185b364df10c6bcf2e0369b37c7de675f5737ead96a9",
    "signature": "0xb271fd2a26f41dbc336af2c903b127156d9ef395fa16c04a7846e58d9513f5556debb7809e04632bff55589ae6c165ceaa6470e04d03aece7d23cc8ec45d80651c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}