{
  "manageEntity": {
    "action": "Save",
    "entityId": "1493045156",
    "entityType": "Track",
    "nonce": "0x1d7e75bf68e6ced077573474a13f5c5e89e0e73936318cf1cd8d4ab0fd6cd111",
    "signature": "0x7c70a4af87b2d0b682e816435e9b0d30425807f8ecaa6635b385990577fe644c7473e5bb14f89b1fc97150a83f9a4efc2216157d7d97a209a1212ccadfa77e591b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}