{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935519377",
    "entityType": "Track",
    "nonce": "0xc43cd8dfc3aab5aeb791c7350194c0e18b32de852504c90c13376a936ab071bc",
    "signature": "0x74f1c72da0c7288b75209a205c174b39cb30e16bc81409656844ffe5bc9af109283125b586339e6993041b6d756cdba64dba67ea3d124f3b5ef397bc268f60161c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}