{
  "manageEntity": {
    "action": "Save",
    "entityId": "326160950",
    "entityType": "Track",
    "nonce": "0x4f49d8d64c385c426215257f8bd84c7289fe605daf306104b8e48fa81d36320a",
    "signature": "0xa186376156f8e87f2a50d656a453725af19ef1aed26f710f7d56abaf53bb875d557b2983d01630fead6b7aa63ab7d65f66bfcc5d57dd8d4016901419ac9a3f481c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}