{
  "manageEntity": {
    "action": "Save",
    "entityId": "459682379",
    "entityType": "Track",
    "nonce": "0xcc6e4186b31d6b12e497ea0c41b909160305059c539f77515b7efd7830bc07d8",
    "signature": "0x700711ff7f70c3a607c802f51a739809426f28ef183e87f156dd3f29f2bd2c557b883e79109b6c25f6497a6730bc3892efe9ee7089c3605f4b46e070e7818b2d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}