{
  "manageEntity": {
    "action": "Save",
    "entityId": "83242221",
    "entityType": "Track",
    "nonce": "0xdac7749b539aabfb3a53681e9bc058112918a55f7aac809526d31e35abb840fc",
    "signature": "0x712f938ea1925b25d8a8544fa3c4c888f2d0f7882f85326599b594a465322ae819e21e83b8d1dd40a023e865d9f8f7b7b67064ce2f8427556587f468546616821b",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}