{
  "manageEntity": {
    "action": "Save",
    "entityId": "98744",
    "entityType": "Track",
    "nonce": "0xe96fcb3643968fabf288f4dd0f1ee4c6f01f84c03d0e52d959909108cc3ca3d1",
    "signature": "0xb3add018130af6a08f924afb35a013148b6230ed03950c59c08a420d136fa8f32b0c5b4421e336fa93ffab6812e39cab20cc002e76ba7468b06c0739ac043e4a1b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}