{
  "manageEntity": {
    "action": "Save",
    "entityId": "1138573040",
    "entityType": "Track",
    "nonce": "0x56bc878856fab96a3efb5101098ab79c5236fa02cc64dd8b34ec93929f451249",
    "signature": "0xd443dc552a0ad3dce6a12db0bcec989c3f9ed97fc5262dd7cdfefbb9a19f7c0332c2af68c5e32a00f25f3ff4d4c889ef0d596218f5b4037fdb8e1e756b0b51ad1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}