{
  "manageEntity": {
    "action": "Save",
    "entityId": "415387834",
    "entityType": "Track",
    "nonce": "0x76a665deb4a27bc5ff22962cbb0ada553497f6d267a5e4205d16ae19090ab26a",
    "signature": "0x708c30b4c09bd822f9557a27a2ae4aad0755b0b513f50d77dd89cff51891da242ea92b3dc1203db479b79f3c9634abed7f42d86ea9c0ff321bc27ce7e530e7a41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}