{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837413172",
    "entityType": "Track",
    "nonce": "0x72f71b780bcaa8802b6676a76acda349bb72a2336246b27287d68eae3859b56c",
    "signature": "0x861df6b989755ab18bb753875e26f704eaf0a004215125140649ecb5065313430896eee404d792f33e8b7fa883483c6f7532c6ee3d4e235a02b4e8770f32339e1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}