{
  "manageEntity": {
    "action": "Save",
    "entityId": "775930515",
    "entityType": "Track",
    "nonce": "0x02c9c7e5e95d831e5b47fd265d976cfc027baa5f59dab4429abc70d3bc7a3e4f",
    "signature": "0x0687d23b4f13577c54567e5f0fa84603850e3bdd86fd71baa208a8d143785f1d39ad2123c92f7b4dc58e6d1d097c10cda04cbdeb17e4de57f28a95ba2d7db8ed1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}