{
  "manageEntity": {
    "action": "Save",
    "entityId": "679460483",
    "entityType": "Track",
    "nonce": "0xc6bf726b49410989080752643ab45c8e4a56cafc70a6ca4bb8d4dab1b87c6301",
    "signature": "0xaa2bcef914eb0bc4245300d3abdd7f8bafb2a61c97b469981822b41f3ffdf3245d3853aac42e93f7a79a88e3a88e98c3e014bd439aeea9f06da1c2a35714aaad1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}