{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150652386",
    "entityType": "Track",
    "nonce": "0x676381d99f9165d2daedf06dbf7a6a38b4b7e71a8a01d74f2170fc327440e075",
    "signature": "0xfc4809b66a7d5429b80a4ac33fc0af09772446a64ced596f7cb1f577cccbeda81a4459402793ccd8a6be097ff1aec5b1060f9300e939027e247abd84e9f9b10f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}