{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121977",
    "entityType": "Track",
    "nonce": "0x7ae4554ee452a8707f95a89f339b5f40408c269f210fd5cdadb86333e9051c7d",
    "signature": "0xe527dd9b12810ec7809e824d2407eebbdcc5f99b2cfbec5721ece11ad446609d12469eb0b476a5a5a8dd0024a362a22cdf6bde73abfc250a4e99b8a82aa927e11b",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}