{
  "manageEntity": {
    "action": "Save",
    "entityId": "610197",
    "entityType": "Track",
    "nonce": "0x03745702600355c7236530dbb9fae8a47f029c71fee78b6849def673fa2542c5",
    "signature": "0xd09331b61363b841556f4679daaa3860185e5877587b8a7fd3072674a91583c71d6425c6c46b0272364cef8090c23d1f31505b925fbf694fd0c9dd9688e5ee9a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}