{
  "manageEntity": {
    "action": "Save",
    "entityId": "481531940",
    "entityType": "Track",
    "nonce": "0x49f5aef77167bb8246a83fa2faa963bb0540e87e0cb041fb0e3caa0ca918b578",
    "signature": "0x529ed88cf6dd0936057d614321dc05f0d0316dec1f824e75d3d633e6d4b1010040bfd82e4ab1391cfc0148f9d72d193ca648e4e6770b0eb7238d55461e7674161c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}