{
  "manageEntity": {
    "action": "Save",
    "entityId": "694680",
    "entityType": "Track",
    "nonce": "0x2f59b5e6cb7c96052d21cf412c4b70ed2c707e66f7b11e80319e634829d6bdde",
    "signature": "0x32c761200fa013a47b45d863eed0ffb90fbd5f748ebf340cf516a51e3eb6653e768054643b5ee8cb2655aa0d5f6f26c024fda2c038b1f7424d9af46ef0bb2acc1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}