{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841969044",
    "entityType": "Track",
    "nonce": "0x5182d02d0d715c5b28b4f1e6257d1423fb02dfdbdff7e93d5660d5149c435168",
    "signature": "0x77449f436bc0b64468797163c57dcc0caf1d55498029bdb232a33a0e0657368a00fc71857f69b0b7162843008e44191ae6a374a693f70f393ca41225d97f972c1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}