{
  "manageEntity": {
    "action": "Save",
    "entityId": "822749588",
    "entityType": "Track",
    "nonce": "0x40aca71e78bb7c865148d862ef66e2a3be4b1bec794eb06f7b88877831a4d9c3",
    "signature": "0x73afd2d46840457482b5170e99bc91402104561db766aa4de7ae5a44c438df9528c6d10c5c08f92db08ff89d3b572f59cce94f40914bb981660f312ecf4d94e11b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}