{
  "manageEntity": {
    "action": "Save",
    "entityId": "817442485",
    "entityType": "Track",
    "nonce": "0xb5d7be5f45af8f43ca44335b0e7bb7bf6dd39642f4d0d2da8e45d60fe64b5c57",
    "signature": "0x73fd69cc1cad421ba2cb18b607205fc670b6b3c16dcb50d8957590dc0fd9e3c338b6135c2e091e95150022569e392842aaa748eac87edb59f518dad7632134f51b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}