{
  "manageEntity": {
    "action": "Save",
    "entityId": "1531613036",
    "entityType": "Track",
    "nonce": "0xc41cfd4f3778a115d5e26d4c8d3dd0c88eee625abafd683c36a4903d7a3abc0c",
    "signature": "0x21ea1ec6ad723702c33d3f4722a08ede19b716bb7e36f8ea8d696163965da7976efbeaaad982dbea894d9768f3184c5b455f155a4d77d6cfb5f585e68ae21e7c1b",
    "signer": "0xB60638A16dB9440769D68556a99A3D24d3F7F26F",
    "userId": "137494"
  }
}