{
  "manageEntity": {
    "action": "Save",
    "entityId": "1937967819",
    "entityType": "Track",
    "nonce": "0x7dca64270a371984ac035c9d571ba0736be22ff48fe69410fe064ccab9cf476b",
    "signature": "0x1864b6747ec4991c6b6857cd89d63753d5ea43096221ccf45b4f97019a232a8826febe0c2907e6b9805f6605ac852547ee7db6eb3dfc27a528a1f5200ad149241b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}