{
  "manageEntity": {
    "action": "Save",
    "entityId": "722782031",
    "entityType": "Track",
    "nonce": "0xe913a3f500bb9680738b41abba0a955a28d0aff099758f4e6c628535fafb3772",
    "signature": "0x2eee1850bfeff39f2264be34cc5dda986e659827f446e3bef5eaad3c7d993a0757aad87cd8ec145241333b061befe5977bf9a61e6280f290f435510250d4ca5a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}