{
  "manageEntity": {
    "action": "Save",
    "entityId": "349576",
    "entityType": "Track",
    "nonce": "0xa3d022af4ba65fe03f795db5fc042321db54d5613f61e61e5fbd559747fdf0bb",
    "signature": "0xf41596ffd22f87f93a53791877e5c58a7bed22faf55223d550db728e598b21b861c2115bdc0d5916af20aa9b38d3a15cefcdba575ac5b2472c591bce3d9f09b51b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}