{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947574846",
    "entityType": "Track",
    "nonce": "0xdefc60f1e00ba9e8ca22ecac8d3fc604f928502e8af0bd13f574fce84b758136",
    "signature": "0xb0bdb49cb3c798133c9a0a6d4eb3d0fce0fddb5f02bbb8f5abe52b1ba4a3bad67aeea1ea04d343f4f34f3d2ef0747e813991de2bcf8ad32f361d54fbeedba1561c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}