{
  "manageEntity": {
    "action": "Save",
    "entityId": "380874",
    "entityType": "Track",
    "nonce": "0x5eea30b55ababaa92cc742c11775b783dec493365fc9e1b6e4b38105e63eb0a2",
    "signature": "0x4fc9f7d0d6be92ee2ec0f6b6b862b876b9992b236a808666cba5a28e1afd64557020c3cfeb5811cddb3e49bcd22a18cb07ff078211cc3583ef3c2c56f56569df1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}