{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293091053",
    "entityType": "Track",
    "nonce": "0x12dcbd86f01ad44c7426dde418a3c2750af495707517ced1e0d11aec690cfcac",
    "signature": "0x2a8e655e79f1b893a157c211972be89cf7d8a534611693cb51002810f3c6099424d2cdc71b6559c6250be89502641a950735f92e0168fd68c7ebc4b9fee4dc931b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}