{
  "manageEntity": {
    "action": "Save",
    "entityId": "65260",
    "entityType": "Track",
    "nonce": "0xe299fb3b4e27b81c03e115f802b32cffb2e30ceb709dfd83dd93bc85d243d605",
    "signature": "0xda9024ff8e9cbade58f6c0fd15313e6071f8bb32b8ceb702f785dcd822073e1c2ebe0008012b8da1524ccfbcda52817b27ff86a0cb438cb5e5d5d9395ad0b38d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}