{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840381949",
    "entityType": "Track",
    "nonce": "1792396102159664022",
    "signature": "0xc6b63e0f94ed892929e14b56c65095946ff7cc16df568505125819f19b0087812fa30b091e6d14764411baaa2101aead1f0f17ced8ddf433672ae0b4a4d52c9d1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}