{
  "manageEntity": {
    "action": "Save",
    "entityId": "1025987",
    "entityType": "Track",
    "nonce": "0xb1f6c2e81bb1965eab5a7f5e38812377c9417e21897e48efcefb2a77a6025c73",
    "signature": "0xa389d2b33977516cecfd8f6b67b009454d17dc2373bb297080fd829d6314392331d4521ce06eb87bec9c038b39730054f937912cace26a0439bd3db49c9a0b1e1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}