{
  "manageEntity": {
    "action": "Save",
    "entityId": "329952774",
    "entityType": "Track",
    "nonce": "0x107ab0b57b8c45948c3d8d794e304eb710c3cb0b9f43970bd1dddddbcc8405aa",
    "signature": "0x847302caab28bb8edead5d5a4c0fcb35f68040ee3a142a64d421676ac327cc06690267cde8f88b8e6dce3a2b0d4461f4fa3ac9fa7a05984fb1cf63064189c5d11b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}