{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000071",
    "entityType": "Track",
    "nonce": "0x8f83094be93fdd0b6022356306182c3ba7d33d86e3a1adc4f270c1b58c3d414b",
    "signature": "0x7068d4326bc88cfaf4c76cb459556f7642ec9c318be836cc3b608e4584b5cfde78fca5a56d314d183fef5d23347571ef11345187ac25998ac62a9e2719d14b8d1c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}