{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990695165",
    "entityType": "Track",
    "nonce": "0x7dc39ae61a2902f27b9605499503d96cc8503cbd2a158ed1382c835aed44ff22",
    "signature": "0x963d6c39b8aed66763dc1269871f18d666ca5a29729a10560a2a17e19e340365387a1d4af2443408cad0c73677092bf1bb9a24d4b43269eab58228f9dc584d0e1b",
    "signer": "0x9881bA04eA95d8a4De5594aBC9DBd5c96F38eF34",
    "userId": "211307"
  }
}