{
  "manageEntity": {
    "action": "Save",
    "entityId": "1135334467",
    "entityType": "Track",
    "nonce": "0x8dd3d74b7ea9aaa393a114a6720ccd17924219278eb638ac2d66bcc42b477dcf",
    "signature": "0x965ea60d0306e4e0d9474be733be42b9d2629bacea8b623e1ae0c81b43026ffd11b882a0626e3135d8a77d66f068b36634d44053d7034c4a5ce1de9a4a73a2211b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}