{
  "manageEntity": {
    "action": "Save",
    "entityId": "1400113620",
    "entityType": "Track",
    "nonce": "0xde60d79e228884df0b65041c623de39cb8386003438ea6288059ceefa1165de2",
    "signature": "0x051de43c829441feab8ad360ad9c38b9cfedd3292f0588e87debdefedf0f09f6282f551302d49e2c7d94a43700250629574e9c7507f1f5e1725d317a0628d4471b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}