{
  "manageEntity": {
    "action": "Save",
    "entityId": "1690591635",
    "entityType": "Track",
    "nonce": "0x079f922b69d6418e248495a051d18416ebfc4d29eadd60e08541f94f07898799",
    "signature": "0xb552ab7a60340b0c988aaf144af7cf7d2393410e3f6afa423cf8199be5b31f697e3924e734c54b0e748ddb418750503158370bf4e24d1a530afd9ec26f83124d1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}