{
  "manageEntity": {
    "action": "Save",
    "entityId": "567073056",
    "entityType": "Track",
    "nonce": "0xcb60147443b925a0b929160af79bad2f61e51bbd46ce1ff71666bba85ac4a394",
    "signature": "0xa84c4daaebabb2f7c82dbafea7f02dcc7038ea1f00ffc12839179d661357002a33b13d58428f1de212ee2cf267ad08f2e2bb1f9154044dd91b78e15634227f5e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}