{
  "manageEntity": {
    "action": "Save",
    "entityId": "757738",
    "entityType": "Track",
    "nonce": "0xffa52f8081f42dcb11af1f22295dd99aa118628aa3d1103a6edd1cc2fc3b6b86",
    "signature": "0x093cc85a688bca03f82a1692fa5004535d29220f99ad20ecdabf06ed8d7b216d38b61ddceedbb0f2ad3e2479a3b27d01dd95acd273be4cb5b90a95222393aa021c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}