{
  "manageEntity": {
    "action": "Save",
    "entityId": "324660302",
    "entityType": "Track",
    "nonce": "0x06e4fcefb412cfc23c955aef07a34f3cf7ca90c485385d2359f9d61282591b5a",
    "signature": "0x7f040868371d9ec2c4f980ce8b56deae838e2130062b7d6dce73cd633cd6e6cb18016d62aa68ffea7745f4805a5c835c84bbb0e211b7e491b09a96c7cee227c21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}