{
  "manageEntity": {
    "action": "Save",
    "entityId": "700138418",
    "entityType": "Track",
    "nonce": "0x1c8c330ad88abfe5a0fcaf9dfd21f14c9047fe015021093d7aa17281c937073f",
    "signature": "0x8b6768839e1b8dc685470f081fb121b9376eb7dbf7167761e3e2dae6f358a7d04ad87d5fd6b47fd6f44066aac9d60b626ee36ad72fc51410de51e2c8716c64db1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}