{
  "manageEntity": {
    "action": "Save",
    "entityId": "299898",
    "entityType": "Track",
    "nonce": "0x59557f2de269993e27931ecf3e6fbc36cf5009de81630eb17676404020934677",
    "signature": "0xd8f9e9b0ed07a644221da27b4f719a92b44ee89266b83d5be8926fd06048127f29b47cec2a97c483b9867736a9736c7dfd55b2dd4516ced4ea4a274a644df53b1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}