{
  "manageEntity": {
    "action": "Save",
    "entityId": "754646361",
    "entityType": "Track",
    "nonce": "0xede2f622c777bbf15a6f3479d7c78800a129ce178c5076e36967780d8f857fde",
    "signature": "0xb677d2877f350e1aeb053d6f4340596e6dcce9f451e2abad193bf396580efd770038327864276eaaf17cd6fa7ec9ce9040adb3f4b42642de8fdab17c80efa92c1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}