{
  "manageEntity": {
    "action": "Save",
    "entityId": "119729",
    "entityType": "Track",
    "nonce": "0x7e3b10c22463c8a07bfe050470d1ee43374e8b9a148d589f13b7ad952c2e3bf3",
    "signature": "0xceec5d13bc13d9d54afd0e6b3c1d2c04615662a96b051f8fa76d45032a89e85d1a4a27830b5e844fbb082b071a6ebab603f385443454d7f4c772749c7f7a8c381b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}