{
  "manageEntity": {
    "action": "Save",
    "entityId": "714962548",
    "entityType": "Track",
    "nonce": "0x1de98bc1cef5552f3cc78716ca1d6a0af2f41064fc411654693f107aef637484",
    "signature": "0x1dacaa5e5fec5a73a74acb6646792c3402ae22fa27c5265edfa62873c7722ba525e736ad1f9628e8eb30b6bec72511159be4378ab4693228f1972338844e7e711b",
    "signer": "0x8F8C9b3BcE42B04f072D7Bd2093c3ad5E26De738",
    "userId": "967470359"
  }
}