{
  "manageEntity": {
    "action": "Save",
    "entityId": "306617",
    "entityType": "Track",
    "nonce": "0xab81757df6f77563ca149bcaffe387c5680f6116035e6103b541dfdd8b0943ea",
    "signature": "0x0a741085a3ee6f7b4cb894e47cc06800d2696b402ca3a74046410eac047a28ad481960e466b347c05243f66cbee1c5cc0993da06b5874d3a67882bfc78a7deb91c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}