{
  "manageEntity": {
    "action": "Save",
    "entityId": "1215033157",
    "entityType": "Track",
    "nonce": "0xc715c2f84bd86ac67a9dd52dddb0ac8774c6910d25f8f453f8fdd5f01d7bc0cf",
    "signature": "0xbfba3dc6d31345ddc6214ee5fe612984098638f649f0b8b7e41de44a10ac9b2b1ef24d08957da11ddd2908fb5a31c5a8665e9e401bd4787bade9b80c83386d591b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}