{
  "manageEntity": {
    "action": "Save",
    "entityId": "322350669",
    "entityType": "Track",
    "nonce": "0xa908b9fe15de0ba54b6e7f10f0d78a164acb593a6bad2ba9a7e501a34448df69",
    "signature": "0x55b5472275b146cee5744f5fc4f6d2de1f4bc1930a26ad699d124d9f6e27baa9388164125e6453f9dbf578f4dd9cc38b56ab687e0ee88995f885bec6012dfc021b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}