{
  "manageEntity": {
    "action": "Save",
    "entityId": "1977034976",
    "entityType": "Track",
    "nonce": "0xa2db1836e0f5f4550adcaff8ddb3502bc323ae3c6c169c2ee003fad4a430a1f6",
    "signature": "0x1d3d384fc9e57d8fdbb6115457fe640fcb51d8529a05546dc16aa289159e12ef51b27a7d1c3c9090a5c3f295a6b147fe4325a3047b9e335ab56a36aaa3bd51b81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}