{
  "manageEntity": {
    "action": "Save",
    "entityId": "252014",
    "entityType": "Track",
    "nonce": "0x10cb018ecbdecafc5070aff132c02b2cb792856b969cc76e17389660357c27fb",
    "signature": "0xfa734a612c02958f251ad9648a2136c0acc7e43e2405b2046c31f8f66c368ffd3232b6ab49b58017bdee4fcb068329953e4a062d15f79acbd1e8852b4e3db5951c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}