{
  "manageEntity": {
    "action": "Save",
    "entityId": "230705049",
    "entityType": "Track",
    "nonce": "0xae9bf38b5477b620d7fa3492c6b2c4f4ae09b5626ca7cfb59abe4aa50117f7e0",
    "signature": "0x4d30deb2a878c0575eab8199295ae4081c672e9a71dbbde10d4456210374bec325cafed094ee4c1541fbd59282fdebfa29bf64006806c20de3878e833d722b5b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}